EP2172711A1 - Fumes extracting device and method for producing same - Google Patents

Abstract

The vapor extraction unit has a water shield with a plate shaped water shield element (1) made up of glass or glass-type material. A scratch-proof hard layer is laid on water shield element. The water shield element has a splitter guard layer that is a foil, particularly a polycarbonate foil or polyester foil. The splitter guard layer is glued together with the water shield element, where bonding agent is an acrylate glue layer. An independent claim is included for a method for producing a vapor extraction unit.

Description

The invention relates to a fume extractor according to the preamble of claim 1 and a method for producing such a fume extractor according to claim 16.

In particular with food lawn parasols, pre-stressed or non-tempered glass elements are used. Prestressed glass elements offer increased resistance to temperature changes, as well as high bending, impact and impact resistance. The increased strength results from a tempering process in which the glass element is heated and then quenched with cold air. As a result, it is known that there is a high compressive stress on the surface and a tensile stress in the interior which is in equilibrium. The production of such prestressed, especially curved glass elements is expensive and associated with a high production committee.

Alternatively, non-tempered glass elements may be used as vapor screens. Such a generic Wrasenschirm is from the DE 201 22 379 U1 in which the vapor shield can be made of glass, in particular safety glass or laminated glass, or of a transparent plastic. The vapor shield is provided with a transparent coating, which prevents fragments fall off when breaking the vapor shield.

This transparent coating of the vapor shield is sufficiently tear-resistant and interpreted with high adhesion, so that a mechanical overload of the vapor shield a certain residual capacity and a fragmentation bond is provided, which reduces a risk of injury. In addition, a high surface hardness of the transparent coating is required to avoid scratches on the surface. Optimization of the scratch resistance, however, may affect the adhesion and tear strength of the coating and vice versa.

The object of the invention is to provide a fume extraction device and a method for producing such a fume extraction device, which has a cleaning-friendly Wrasenschirm.

The object is solved by the features of claim 1 or claim 16. Advantageous developments of the invention are disclosed in the subclaims.

According to the characterizing part of claim 1, a highly transparent scratch-resistant hard layer is applied to the plate-shaped Wrasenschirmelement, in particular the suction side. In contrast to tempered glass elements, therefore, the glass element surface is not cured in a complex heat treatment, but is applied, such as a non-biased Wrasenschirmelement, the hard layer, which has a correspondingly high surface hardness.

Manufacturing technology is easy if the hard layer is coated as a hardcoat in a coating process on the Wrasenschirmelement. It is therefore not necessary to provide a separate hard film as a semi-finished product. Rather, the Wrasenschirmelement can be spray-coated in a simple manner, for example. As such a hard layer is particularly suitable a silicate protective layer.

For safety reasons, the Wrasenschirmelement, in particular when using a non-prestressed glass element have a splinter protection layer. In this case, the hard layer according to the invention can be arranged with the interposition of the highly transparent splinter protection layer on the Wrasenschirmelement. The shatter-proofing layer can be, for example, a film, in particular a polycarbonate film or a polyester film, which are both tear-resistant and have a sufficient adhesive action. To increase this adhesive effect, the splinter protection film can be connected via an additional binder to the plate-shaped Wrasenschirmelement. The splinter protection layer and / or the hard layer preferably have a temperature resistance up to at least 130 ° C.

Alternatively or additionally, the splinter protection layer and the hard layer may be arranged on opposite sides of the vapor shield element.

Preferably, the splinter protection layer can be arranged on the side of the vapor shield element facing away from the suction side, as a result of which the splinter protection layer is subjected to less thermal stress. The splinter protection layer may be covered with the hard layer, whereby the Wrasenschirmelement is protected on the upper side from scratches by parked on the Wrasenschirmelement objects.

The use of acrylate adhesive is particularly advantageous in connection with a Wrasenschirmelement of polycarbonate material. Since both the acrylate adhesive and the polycarbonate material of the Wrasenschirmelementes are the same material or the same families of materials and therefore a particularly strong adhesion with the Wrasenschirmelement achievable. In particular, plate-shaped Wrasenschirmelemente of polycarbonate material can also be designed arcuate in a simple forming process.

As already mentioned above, alternatively, the plate-shaped Wrasenschirmelement can be made of an unbiased glass element. A material structure consisting of an unbiased glass element, a scratch-resistant hard layer and / or an additional splinter protection layer is thus an inexpensive alternative with respect to the fracture safety compared to a prestressed glass element.

The material structure used here, consisting of the plate-shaped Wrasenschirmelement, the scratch-resistant hard layer and the splinter protection layer, is made overall transparent. In contrast, partial surface areas of the vapor shield element can preferably be colored with different design features or alternatively have a design pressure. The design print can be designed, in particular, as a screen print, protected from sight, in order to blind, for example, technical parts of the extractor device by means of the design print. The design pressure may preferably be provided in the shatter-proofing layer, which is arranged protected in intermediate position between the vapor-shielding element and the hard layer. In particular, when using a Wrasenschirmelementes of polycarbonate material, the design pressure can also be applied directly to the Wrasenschirmelement.

For safety reasons, it is particularly preferred if the plate-shaped Wrasenschirmelement is a laminated glass of two glass plates with intermediate adhesive layer. The adhesive layer is usually a tear-resistant transparent PVB film. In combination with the splinter protection layer, two layers are thus provided, providing a particularly high residual capacity and splinter bond in the event of breakage of the vapor shield element.

In the production of the plate-shaped Wrasenschirmelementes first a glass blank or a blank made of vitreous material is provided, on which the scratch-resistant hard layer can be applied directly. In combination with the anti-shattering layer, in addition to the blank made of glass or vitreous material, an anti-shatter foil, such as a polycarbonate foil, may be provided which may be applied to the blank using a binder. Only after the anti-shatter foil has been applied to the blank, can the hard layer then be coated on the anti-shatter foil.

Alternatively, the splinter protection film can be coated only with the hardcoat. Subsequently, the coated with the hard layer splinter protection film can be applied to the Wrasenschirmelement.

Hereinafter, three embodiments of the invention will be described with reference to the accompanying drawings.

Fig. 1

in einer perspektivischen Ansicht von unten eine Dunstabzugshabe mit einem plattenförmigen Wrasenschirmelement;

Fig. 2

in einer schematischen Schnittdarstellung den Materialaufbau des Wrasenschirmelementes gemäß dem ersten Ausführungsbeispiel;

Fig. 3

in einer Ansicht entsprechend Fig. 2 das zweite Ausführungsbeispiel;

Fig. 4

in einer Prinzipdarstellung das Verfahren zur Herstellung des Wrasenschirmelementes gemäß dem zweiten Ausführungsbeispiel;

Fig. 5

in einer Ansicht entsprechend Fig. 4 ein abgewandeltes Herstellungsverfahren; und

Fig. 6

in einer Ansicht entsprechend den Fig. 2 und 3 den Materialaufbau des Wrasenschirmelements gemäß dem dritten Ausführungsbeispiel.

Show it:

Fig. 1

in a perspective view from below a fume extractor with a plate-shaped Wrasenschirmelement;

Fig. 2

in a schematic sectional view of the material structure of the Wrasenschirmelementes according to the first embodiment;

Fig. 3

in a view accordingly Fig. 2 the second embodiment;

Fig. 4

in a schematic representation of the method for producing the Wrasenschirmelementes according to the second embodiment;

Fig. 5

in a view accordingly Fig. 4 a modified manufacturing process; and

Fig. 6

in a view corresponding to the FIGS. 2 and 3 the material structure of the Wrasenschirmelements according to the third embodiment.

In the Fig. 1 in the installed position, an extractor hood is shown, which has as a vapor shield a plate-shaped Wrasenschirmelement 1 made of a polycarbonate material or a laminated glass material. Like from the Fig. 1 shows, in the Wrasenschirmelement 1 a rectangular recess 3 is provided, the edge region is fixed to a lower side of the Kamingehäuse.

In the Fig. 2 the material structure of the Wrasenschirmelementes 1 according to the first embodiment is shown with a laminated glass as a carrier substrate. Accordingly, the vapor shield element 1 has two unbiased glass elements 5, 7, which are connected to one another via an intermediate layer 9, for example made of tear-resistant PVB film material. The lower glass element 7 of the laminated glass is connected via an acrylate adhesive 11 with a polycarbonate sheet 13, which acts here as a splinter protection layer. The polycarbonate film 13 is in turn coated with a hardcoat layer 15 which, with its high surface hardness, provides a scratch-resistant underside of the vapor-shielding element 1 which is thus easy to clean. The hardcoat 15 may in particular be a silicate hardcoat.

According to the Fig. 2 are provided with the intermediate layer 9 between the two glass elements 5, 7 and with the polycarbonate film 13 a total of two layers, which are both tear-resistant and formed with high adhesion. In case of mechanical overload, z. B. by a blow or a shock breaks the laminated glass indeed. However, with the intermediate layer 9 and the polycarbonate sheet 13, an increased residual load capacity as well as splinter bonding is provided, whereby a risk of injury to the user is almost excluded.

In the Fig. 3 is alternative to the first embodiment of Fig. 2 shown the Wrasenschirmelement 1 according to the second embodiment. The Wrasenschirmelement 1 here as a carrier substrate no laminated glass, but a polycarbonate material. The polycarbonate material is characterized in particular by a simple formability. Apart from that corresponds to the further material structure in the Fig. 2 shown material structure, namely a polycarbonate film 13 which is connected via the acrylate adhesive 11 with the polycarbonate Wrasenschirmelement 1, and the hard layer 15 which is coated on the polycarbonate sheet 13.

As already mentioned above, an increased adhesion between the polycarbonate foil 13 acting as an anti-shattering layer and the vapor shielding element 1 is of great importance in terms of fracture safety. Such an increased adhesive effect is achieved in the second embodiment in particular by using the acrylate adhesive 11, which belongs to the same family of materials as the polycarbonate material of the Wrasenschirmelementes 1 and the polycarbonate sheet 13. In this way, a break resistance can be provided in the second embodiment alone by the polycarbonate sheet 13, which corresponds approximately to the resistance to breakage of the material structure shown in the first embodiment.

In the Fig. 4 is a perspective view of the manufacturing method of the Wrasenschirmelementes 1 according to that in the Fig. 3 illustrated embodiment illustrated. Accordingly, in a first method step I, a respective polycarbonate material blank 17 and a polycarbonate foil 13 are provided. These two semi-finished products are connected to one another with the interposition of the acrylate adhesive 11 in the second method step II.

In the third method step III, the hardcoat coating 15 is then sprayed onto the polycarbonate film by means of thermal spray coating. For the thus three-layered structure, consisting of the polycarbonate blank 17, the polycarbonate film 13 and the hardcoat layer 15, therefore, only two semi-finished products, namely the polycarbonate blank 17 and the polycarbonate film 13 are to be provided in manufacturing technology, while the third layer is simply sprayed on in terms of manufacturing technology and does not need to be kept as a sheet material.

In the Fig. 5 is a modification of the in the Fig. 4 illustrated manufacturing method illustrated. As a result, the polycarbonate sheet 13 is provided separately and coated with the hard layer 15 before being applied to the blank 17, as shown in FIG Fig. 5 is shown in step I. In the following method step II, the composite formed from hard layer 15 and polycarbonate foil 13 is then applied to the blank 17.

In the Fig. 6 is shown in a sectional view of the material structure of a Wrasenschirmelementes 1 according to the third embodiment. The Wrasenschirmelement 1 has as a carrier substrate on a polycarbonate material, as it is also used in the second embodiment. In contrast to the preceding embodiments, the Wrasenschirmelement 1 is provided on its suction directly with a hard layer 15, that is, without interposition of the splinter protection layer 13. The splinter protection layer 13 is arranged on the opposite side of the suction side of the Wrasenschirmelementes 1 side.

The splinter protection layer 13 is according to the Fig. 6 covered with an additional hard layer 15. This is guaranteed. that objects placed on top of the vapor shield element 1 leave no scratches on the vapor canopy top.

LIST OF REFERENCE NUMBERS

1

Wrasenschirmelement

3

recess

5, 7

glass elements

9

interlayer

13

Splinter protection layer

15

scratch-resistant hardcoat

17

Polycarbonate material blank

I, II, III

Process steps for producing the vapor shield element 1

Claims (16)

Vapor extraction device with a vapor shield, which has at least one plate-shaped Wrasenschirmelement (1) made of glass or vitreous material, characterized in that on the Wrasenschirmelement (1) a scratch-resistant hard layer (15) is applied. Vapor extraction device according to claim 1, characterized in that the hard layer (15) as a hard coat in a coating process (III) on the Wrasenschirmelement (1) is coated. Vapor extraction device according to claim 1 or 2, characterized in that the hard layer (15) is a silicate protective layer, a two-component hardcoat or a UV-curing system. Vapor extraction device according to one of the preceding claims, characterized in that the vapor shield element (1) has a splinter protection layer (13). Vapor extraction device according to claim 4, characterized in that the hard layer (15) with the interposition of a splinter protection layer (13) on the Wrasenschirmelement (1) is arranged. Vapor extraction device according to claim 4, characterized in that the splinter protection layer (13) and the hard layer (15) on opposite sides of the Wrasenschirmelementes (1) are arranged. Vapor extraction device according to one of the preceding claims, characterized in that the hard layer (15) is arranged at least on a suction side of the Wrasenschirmelementes (1), and / or the splinter protection layer (13) is arranged on the side remote from the suction side of the Wrasenschirmelementes (1). Vapor extraction device according to one of claims 4 to 7, characterized in that the splinter protection layer (13) is a film, in particular a polycarbonate film or a polyester film. Vapor extraction device according to claim 8, characterized in that the hard layer (15) in a coating process on the splinter protection film (13) can be applied, and with the hard layer (15) coated splinter protection film (13) is subsequently applied to the Wrasenschirmelement (1). Vapor extraction device according to one of claims 4 to 9, characterized in that the splinter protection layer (13) by means of a binder (11) with the Wrasenschirmelement (1) is glued, which binder (11) is in particular an acrylate adhesive layer. Vapor extraction device according to one of the preceding claims, characterized in that the plate-shaped Wrasenschirmelement (1) is made without bias. Vapor extraction device according to one of the preceding claims, characterized in that the plate-shaped Wrasenschirmelement (1) is a laminated glass of two glass plates (5, 7) with interposed adhesive layer (9). Vapor extraction device according to one of claims 1 to 11, characterized in that the plate-shaped Wrasenschirmelement (1) is made of a polycarbonate material. Vapor extraction device according to claim 13, characterized in that on the plate-shaped Wrasenschirmelement (1) and / or on the splinter protection layer (13) a design print, in particular a screen printing, is applied. Vapor extraction device according to one of the preceding claims, characterized in that the vapor shield element (1) is bent. A method for producing a fume extractor, in particular according to one of the preceding claims, characterized in that a scratch-resistant hard layer (15) is applied to a plate-shaped Wrasenschirmelement (1), in particular by a thermal spray coating.

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